729403 has 2 divisors, whose sum is σ = 729404. Its totient is φ = 729402.

The previous prime is 729389. The next prime is 729413. The reversal of 729403 is 304927.

729403 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 729403 - 2⁵ = 729371 is a prime.

It is equal to p₅₈₇₄₁ and since 729403 and 58741 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (729413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364701 + 364702.

It is an arithmetic number, because the mean of its divisors is an integer number (364702).

2⁷²⁹⁴⁰³ is an apocalyptic number.

729403 is a deficient number, since it is larger than the sum of its proper divisors (1).

729403 is an equidigital number, since it uses as much as digits as its factorization.

729403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 729403 is about 854.0509352492. The cubic root of 729403 is about 90.0165813071.

The spelling of 729403 in words is "seven hundred twenty-nine thousand, four hundred three".